How To look up a License Plate
You would not see the license plate on the desktop app because that looks at the visitor plates.
To find a resident plate, you would log into the portal (https://webapp.tekcontrol-site.com/) with the same username and password.
Click Host Search on the navigation bar to the left.
Change the dropdown to Host Vehicle License and enter the plate number.
Click enter or the red refresh button at the top right.